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Message: [QUOTE="Conndog, post: 4522633, member: 5939"] We put solar on about 8 years ago, I wonder how much more efficient and possibly cheaper are the newest panels today? Also, I wonder how long before we should consider replacing the panels, what their expected life span is. Another questions (and again, I have the panels already), is should we have panels washed so dirt & soot doesn't reduce their production? We can put more solar up on our property, going more and more electric as it is with cars and heat pumps etc, might put up some ground mount system as we have a lower field, but not sure how close to house such a system needs to be. [/QUOTE]